Comment 7 for bug 170588

Using rasterization is exactly what makes this idea
workable, attractive, innovative and universally useful.
This is my opinion, and I'm going to go ahead with it. You
are free to do your own booleans-based tool and let the
users decide which is better.

Just imagine, for example, using this tool to selectively
trace bitmaps. Just click on someone's t-shirt in a photo
and you get at once a vector path tracing this t-shirt and
nothing else. So much faster and more convenient than
regular tracing, and your booleans-based tool will never be
able to do this at all.

As for which resolution to use, of course this should be the
current screen resolution. So if you don't get enough
detail, just undo, zoom in and fill again to get more
precision. Very natural.